package com.haohan.cloud.scm.common.tools.util.unused;

/**
 * Created by zgw on 2019/5/21.
 */

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.Period;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.time.temporal.TemporalUnit;
import java.util.Date;

/*
 * @author kingboy
 * @Date 2017/7/22 下午2:12
 * @Description LocalDateTimeUtils is used to Java8中的时间类
 */
public class LocalDateTimeUtils {

  //获取当前时间的LocalDateTime对象
  //LocalDateTime.now();

  //根据年月日构建LocalDateTime
  //LocalDateTime.of();

  //比较日期先后
  //LocalDateTime.now().isBefore(),
  //LocalDateTime.now().isAfter(),

  //Date转换为LocalDateTime
  public static LocalDateTime convertDateToLDT(Date date) {
    return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
  }

  //LocalDateTime转换为Date
  public static Date convertLDTToDate(LocalDateTime time) {
    return Date.from(time.atZone(ZoneId.systemDefault()).toInstant());
  }


  //获取指定日期的毫秒
  public static Long getMilliByTime(LocalDateTime time) {
    return time.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
  }

  //获取指定日期的秒
  public static Long getSecondsByTime(LocalDateTime time) {
    return time.atZone(ZoneId.systemDefault()).toInstant().getEpochSecond();
  }

  //获取指定时间的指定格式
  public static String formatTime(LocalDateTime time, String pattern) {
    return time.format(DateTimeFormatter.ofPattern(pattern));
  }

  //获取当前时间的指定格式
  public static String formatNow(String pattern) {
    return formatTime(LocalDateTime.now(), pattern);
  }

  //日期加上一个数,根据field不同加不同值,field为ChronoUnit.*
  public static LocalDateTime plus(LocalDateTime time, long number, TemporalUnit field) {
    return time.plus(number, field);
  }

  //日期减去一个数,根据field不同减不同值,field参数为ChronoUnit.*
  public static LocalDateTime minu(LocalDateTime time, long number, TemporalUnit field) {
    return time.minus(number, field);
  }

  /**
   * 获取两个日期的差  field参数为ChronoUnit.*
   *
   * @param startTime
   * @param endTime
   * @param field     单位(年月日时分秒)
   * @return
   */
  public static long betweenTwoTime(LocalDateTime startTime, LocalDateTime endTime, ChronoUnit field) {
    Period period = Period.between(LocalDate.from(startTime), LocalDate.from(endTime));
    if (field == ChronoUnit.YEARS) return period.getYears();
    if (field == ChronoUnit.MONTHS) return period.getYears() * 12 + period.getMonths();
    return field.between(startTime, endTime);
  }

  //获取一天的开始时间，2017,7,22 00:00
  public static LocalDateTime getDayStart(LocalDateTime time) {
    return time.withHour(0)
      .withMinute(0)
      .withSecond(0)
      .withNano(0);
  }

  //获取一天的结束时间，2017,7,22 23:59:59.999999999
  public static LocalDateTime getDayEnd(LocalDateTime time) {
    return time.withHour(23)
      .withMinute(59)
      .withSecond(59)
      .withNano(999999999);
  }

}

